Intelligent measurement system based on HPLC (High Performance Liquid Chromatography) and HRF (High Frequency) dual-mode communication

Abstract

The invention discloses an intelligent measurement system based on HPLC (High Performance Liquid Chromatography) and HRF (High Frequency) dual-mode communication, which comprises an intelligent measurement switch terminal, a data concentrator and a master station system, and is characterized in that the intelligent measurement switch terminal and the data concentrator are respectively provided with a dual-mode communication module; the dual-mode communication module comprises an HPLC communication unit, an HRF communication unit, a parameter setting unit and a communication detection unit; through cooperative work and dynamic optimization of the dual-mode communication module, the accuracy, real-time performance and reliability of data transmission are significantly improved, and effective monitoring and remote control of the state of the intelligent measurement switch are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power data communication, and more particularly to an intelligent measurement system based on HPLC and HRF dual-mode communication. BACKGROUND

[0002] The intelligent measurement switch is a key device in the intelligent power distribution network, responsible for normal connection, disconnection, overload, short circuit fault protection and the like of the line; in order to realize remote meter reading, load control, fault information and other advanced applications, the operating state data of the intelligent measurement switch, such as voltage, current, power, switch state, fault information and the like, need to be reliably transmitted to the data concentrator or the master station system; the existing power data transmission mode is mainly single high-speed power line carrier communication (HPLC) or high-speed radio frequency (HRF); the high-speed power line carrier communication is to use the existing power line for data transmission, and the biggest advantage is that it is free of wiring, but in the power distribution environment with large noise interference and severe load change, the communication reliability will decrease significantly, especially at the moment of switch disconnection, the communication link may be interrupted; the high-speed radio frequency is flexible in deployment and is not affected by the quality of the power line, but its penetration ability is weak and it is easily affected by building shielding and external wireless environment, so the communication distance is limited. SUMMARY

[0003] In view of the above problems, the purpose of the present application is to provide an intelligent measurement system based on HPLC and HRF dual-mode communication, which significantly improves the accuracy, real-time performance and reliability of data transmission through the cooperative work and dynamic optimization of the dual-mode communication module, and ensures the effective monitoring and remote control of the intelligent measurement switch state.

[0004] The present application provides an intelligent measurement system based on HPLC and HRF dual-mode communication, comprising: at least one intelligent measurement switch terminal, at least one data concentrator and a master station system; The intelligent measurement switch terminal and the data concentrator are both provided with a dual-mode communication module, and the dual-mode communication module comprises an HPLC communication unit, an HRF communication unit, a parameter setting unit and a communication detection unit; The intelligent measurement switch terminal is used for monitoring the electrical parameters of the power distribution line and executing line protection actions, and performing data interaction with the data concentrator through the dual-mode communication module; The data concentrator is used for collecting the data of multiple intelligent measurement switch terminals and performing remote communication with the master station system; The master station system is used for data storage, analysis and remote control.

[0005] In the present scheme, the intelligent measurement switch terminal comprises a measurement unit, a protection unit and a control unit; The measurement unit is used for collecting power data of the line; The protection unit is configured to drive the switch to break when an overcurrent or short circuit fault is detected. The control unit is connected with the measurement unit, the protection unit and the dual-mode communication module, and is configured to process data and control communication behavior.

[0006] In the scheme, the communication detection unit at least includes an HPLC communication detection unit and an HRF communication detection unit. The HPLC communication detection unit includes power spectral density detection and cold line communication testing. The HRF communication detection unit includes power spectral density detection, maximum transmit power detection and receive sensitivity detection.

[0007] In the scheme, the power spectral density detection specifically includes: Obtaining a current frequency band and a test item in current power spectral density detection; According to a sub-test item in the current power spectral density detection, determining a theoretical value range of the corresponding test item; extracting test data of the corresponding test item in the current frequency band; If the test data of the test item in the current frequency band is in the theoretical value range of the corresponding test data, the current frequency band is normal; Iterating all frequency bands in the current power spectral density detection process to obtain an accuracy rate of the corresponding test item; If the accuracy rate of the corresponding test item is greater than a preset first accuracy threshold, the current test item is qualified; If all test items in the current power spectral density detection are qualified, the corresponding power spectral density detection is qualified.

[0008] In the scheme, after the power spectral density detection is qualified, the method further includes: Obtaining a noise intensity value of a current position; Multiplying the noise intensity value of the current position by a preset attenuation coefficient to obtain a current power spectral density revision value; Subtracting the power spectral density revision value from the preset power spectral density to obtain a revised power spectral density.

[0009] In the scheme, the cold line communication testing specifically includes: Obtaining a transmit power spectral density and a test item in current cold line communication testing; According to the test item in the current cold line communication testing, determining a theoretical value range of the corresponding test item; extracting an attenuation value in the corresponding test item process; If the attenuation value in the test project process is in the theoretical value range of the corresponding test project, record the test qualified number once; after traversing all test numbers, extract the total number of test qualified, and calculate the success rate of the corresponding test project; if the success rate is higher than the corresponding success rate threshold, the test project in the cold-line communication test is qualified; When all test projects in the cold-line communication test are qualified, the corresponding cold-line communication test is qualified.

[0010] In this scheme, the step of maximum transmit power detection specifically includes: Obtain the test mode of the current maximum transmit power detection; Determine the current wireless parameter according to the test mode of the current maximum transmit power detection; Based on the test mode and the wireless parameter of the current maximum transmit power detection, obtain the current transmit power detection data; If the current transmit power detection data is less than or equal to the preset power threshold, the corresponding maximum transmit power detection is qualified.

[0011] In this scheme, after the maximum transmit power detection is qualified, it further includes: Obtain the distance value between the smart metering switch terminal and the data concentrator; According to the distance value between the smart metering switch terminal and the data concentrator, calculate the current theoretical transmit power; Compare and analyze the current theoretical transmit power and the preset power threshold, and take the minimum value as the transmit power of the current communication.

[0012] In this scheme, the dual-mode communication module is further used for: Real-time acquisition of communication quality parameters of HPLC communication link and HRF communication link; Based on the communication quality parameters, calculate the comprehensive quality score value of each communication link; Extract the communication link with the highest comprehensive score value as the communication path for current data transmission.

[0013] In this scheme, when an emergency event occurs, the HPLC communication link and the HRF communication link simultaneously perform data transmission on the data in the emergency event; the emergency event includes at least one of short-circuit tripping event, overload alarm event, and switch state position event.

[0014] The one or more technical solutions proposed in this application have at least the following technical effects: Through the cooperative work and dynamic optimization of the dual-mode communication module, the accuracy, real-time performance and reliability of data transmission are significantly improved, and effective monitoring and remote control of the smart metering switch state are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 An intelligent measurement system based on HPLC and HRF dual-mode communication is shown; Figure 2 A data statistical diagram of power spectral density detection is shown; Figure 3 A data statistical diagram of cold line communication test detection is shown; Figure 4 A data statistical diagram of maximum transmit power detection is shown. DETAILED DESCRIPTION

[0016] In order to enable a more clear understanding of the above-mentioned objects, features and advantages of the present application, the present application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, and therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0018] Figure 1 An intelligent measurement system based on HPLC and HRF dual-mode communication is shown.

[0019] As Figure 1 shown, the present application discloses an intelligent measurement system based on HPLC and HRF dual-mode communication, comprising: at least one intelligent measurement switch terminal, at least one data concentrator and a master station system; The intelligent measurement switch terminal and the data concentrator are both provided with a dual-mode communication module, the dual-mode communication module comprises an HPLC communication unit, an HRF communication unit, a parameter setting unit and a communication detection unit; The intelligent measurement switch terminal is used for monitoring electrical parameters of a power distribution line and performing line protection actions, and performing data interaction with the data concentrator through the dual-mode communication module; The data concentrator is used for collecting data of multiple intelligent measurement switch terminals and performing remote communication with the master station system; The master station system is used for data storage, analysis and remote control.

[0020] According to the embodiment of the present application, the intelligent measurement switch terminal is arranged on a power line, used for collecting key electrical parameters such as voltage and current in real time, and automatically performing protection action of sectionalizing switch when detecting abnormal conditions such as overload and short circuit, to ensure electrical safety; the parameter setting unit in the dual-mode communication module is used for setting data parameters in HPLC communication detection and HRF communication detection, such as power spectral density in working frequency band not greater than-45dBm / Hz; the communication detection unit is used for detecting whether HPLC communication and HRF communication are normal; the master station system stores and analyzes power data uploaded by the data concentrator, and when generating a control command, sends the corresponding control command to the corresponding data concentrator, and then the data concentrator sends the corresponding intelligent measurement switch terminal to perform; HPLC is the abbreviation of high-speed power line carrier communication, and HRF is the abbreviation of high-speed radio frequency.

[0021] According to the embodiment of the present application, the intelligent measurement switch terminal comprises a measurement unit, a protection unit and a control unit. The measurement unit is used for collecting power data of the line. The protection unit is used for driving the switch to break when detecting overcurrent or short circuit fault. The control unit is connected with the measurement unit, the protection unit and the dual-mode communication module, used for processing data and controlling communication behavior.

[0022] It should be noted that the measurement unit is composed of voltage / current sensor, high-precision ADC (analog-to-digital converter) chip and related circuit, responsible for realizing quantitative collection of electrical parameters, and is the source of system data, and the power data at least includes voltage, current, power and other data in the line; the protection unit is composed of protection algorithm in MCU (microcontroller unit) and driving circuit (such as relay or solid-state switch), which analyzes data of the measurement unit in real time, and triggers action immediately once it is judged that current exceeds the set threshold or waveform meets short circuit characteristics, to protect the back-end line and equipment; the control unit is composed of an MCU or SoC (system on chip), responsible for coordinating the work of the measurement and protection units, processing and packaging the collected raw data, and controlling the communication behavior of the dual-mode communication module, such as deciding when to send data, selecting which link to send, whether to start concurrent transmission, etc.

[0023] According to the embodiment of the present application, the communication detection unit at least includes an HPLC communication detection unit and an HRF communication detection unit. The HPLC communication detection unit includes power spectral density detection and cold line communication test. The HRF communication detection unit includes power spectral density detection, maximum transmit power detection and receive sensitivity detection.

[0024] It should be noted that when all test items in the HPLC communication detection are qualified, the corresponding HPLC communication display is normal; when all test items in the HRF communication detection are qualified, the corresponding HRF communication display is normal.

[0025] According to the embodiment of the present application, the step of power spectral density detection specifically comprises: acquiring a test item in the current power spectral density detection and the current frequency band; determining a theoretical value range of the corresponding test item according to a sub-test item in the current power spectral density detection; extracting test data of the corresponding test item in the current frequency band; if the test data of the test item in the current frequency band is in the theoretical value range of the corresponding test data, the current frequency band is normal; iterating all frequency bands in the current power spectral density detection process to obtain an accuracy rate of the corresponding test item; if the accuracy rate of the corresponding test item is greater than a preset first accuracy threshold, the current test item is qualified; if all test items in the current power spectral density detection are qualified, the corresponding power spectral density detection is qualified.

[0026] It should be noted that, as shown in Figure 2 the power spectral density detection data of the sample machine No. #1 is collected, wherein only the test data of the frequency bands of 89 and 131 are taken for comparison, wherein the test item is abbreviated as test item, for example, including low frequency out-of-band, in-band, high frequency out-of-band, etc., when the test item belongs to the working frequency band, the corresponding theoretical value range is not greater than -45dBm / Hz; when the test item belongs to the working frequency band, the corresponding theoretical value range is not greater than -75dBm / Hz.

[0027] According to the embodiment of the present application, after the power spectral density detection is qualified, it further comprises: acquiring a noise intensity value of the current position; multiplying the noise intensity value of the current position by a preset attenuation coefficient to obtain a current power spectral density revision value; subtracting the power spectral density revision value from the preset power spectral density to obtain the revised power spectral density.

[0028] It should be noted that the revised power spectral density is set as , and the formula is , wherein represents the preset power spectral density, the preset power spectral density is less than or equal to the maximum power spectral density allowed by the corresponding specification, represents the noise intensity value at the emission point f, and w represents the preset attenuation coefficient.

[0029] It should be noted that the HPLC works in the frequency band of 1-30MHz, and there are a large number of legal radio services in the frequency band, such as amateur radio; in order to avoid interference, the relevant provisions will limit a maximum transmit power spectral density If the maximum power is transmitted, the signal-to-noise ratio of the self may be reduced at a frequency point with high noise; therefore, the transmission power at the frequency is reduced, thereby reducing the "hard collision" of the transmitted signal and the strong noise, reducing the self-interference caused by the non-linear effect, and instead helping to improve the signal-to-noise ratio of the overall link; on the contrary, at a "clean" frequency point with weak noise, the maximum power can be used for transmission, thereby improving the accuracy of HPLC communication.

[0030] According to the embodiment of the present application, the step of cold line communication test specifically comprises: Obtaining the transmit power spectral density and the test item in the current cold line communication test; According to the test item in the current cold line communication test, the theoretical value range corresponding to the test item is determined; and the attenuation value in the process of the corresponding test item is extracted; If the attenuation value in the process of the test item is in the theoretical value range corresponding to the test item, the test qualified number is recorded once; after traversing all test numbers, the total number of test qualified is extracted, and the success rate of the corresponding test item is calculated; if the success rate is higher than the corresponding success rate threshold, the test item in the corresponding cold line communication test is qualified; When all the test items in the cold line communication test are qualified, the corresponding cold line communication test is qualified.

[0031] It should be noted that, as Figure 3 shown, different test items have different technical requirements (i.e. theoretical value range), and under the same occurrence power spectral density, the attenuation values of different test items are inconsistent, such as in the test item of sensitivity, when the attenuation value is 95dB, the technical requirement is met, the test qualified number corresponding to the test item is recorded once, and the total number of test qualified is divided by the total test of the whole test process to obtain the success rate of the corresponding test item.

[0032] According to the embodiment of the present application, the step of maximum transmit power detection specifically comprises: Obtaining the test mode of the current maximum transmit power detection; According to the test mode of the current maximum transmit power detection, the current wireless parameter is determined; Based on the test mode and the wireless parameter of the current maximum transmit power detection, the current transmit power detection data is obtained; If the current transmit power detection data is less than or equal to the preset power threshold, the corresponding maximum transmit power detection is qualified.

[0033] It should be noted that, as shown in Figure 4 The test mode includes a PLC (power line communication) to RF (radio frequency communication) backhaul mode, a normal mode and an RF physical backhaul mode, and the wireless parameters selected in different test modes are also different.

[0034] According to the embodiment of the present application, after the maximum transmit power is detected to be qualified, further comprising: acquiring a distance value between the smart metering switch terminal and the data concentrator; According to the distance value between the smart metering switch terminal and the data concentrator, the current theoretical transmit power is calculated; The current theoretical transmit power and the preset power threshold are compared and analyzed, and the minimum value is set as the transmit power of the current communication.

[0035] It should be noted that the current theoretical transmit power is set as P, and its formula is: , wherein The preset power threshold is, for example, 17dBm; The preset calibration distance is The power required at the preset calibration distance is n, which represents the space free propagation coefficient, for example, n=2; the distance value between the smart metering switch terminal and the data concentrator is d; and the current theoretical transmit power is .

[0036] According to the embodiment of the present application, the dual-mode communication module is further used for: Real-time acquisition of the communication quality parameters of the HPLC communication link and the HRF communication link; Based on the communication quality parameters, the comprehensive quality score value of each communication link is calculated; The communication link with the highest comprehensive score value is extracted as the communication path for current data transmission.

[0037] It should be noted that the communication quality parameters in different communication links can be set differently, such as the communication quality parameters in the HPLC communication link at least include signal-to-noise ratio and bit error rate; the communication quality parameters in the HRF communication link at least include received signal strength indication and packet error rate; the step of calculating the comprehensive quality score value of each communication link based on the communication quality parameters specifically includes normalizing the communication quality parameters, determining the normalized value of the corresponding communication quality parameter, multiplying the normalized value of the corresponding communication quality parameter by the weight coefficient of the corresponding communication quality parameter to obtain the weight score value of the corresponding communication quality parameter, and accumulating the weight score values of the multiple communication quality parameters in the same communication link to obtain the comprehensive quality score value of the corresponding communication link; the normalization processing is to map different dimension indicators to the score interval of 0-1; the weight coefficient can be dynamically adjusted according to the baseline test result or historical success rate in the initial network deployment, for example, the communication quality parameters of two links are both 2, and the initial values of the corresponding weight coefficients can be set to 0.5; when the communication link with a high comprehensive score value is different from the communication link of the last data communication, generate replacement communication link information and send the replacement communication link information to the control unit of the intelligent measurement switch terminal or the data concentrator to adjust the communication link.

[0038] According to the embodiment of the application, when an emergency event occurs, the HPLC communication link and the HRF communication link simultaneously perform data transmission on data in the emergency event; the emergency event includes at least one of a short-circuit tripping event, an overload alarm event, and a switch state displacement event.

[0039] It should be noted that when an emergency event occurs, the two communication links simultaneously transmit data of the event, for example, when the switch breaks, arc noise will be generated, which will interfere with the signal link, therefore, the dual communication links are used to ensure accurate data delivery.

[0040] The application discloses an intelligent measurement system based on HPLC and HRF dual-mode communication, which comprises an intelligent measurement switch terminal, a data concentrator and a master station system, wherein the intelligent measurement switch terminal and the data concentrator are both provided with a dual-mode communication module, and the dual-mode communication module comprises an HPLC communication unit, an HRF communication unit, a parameter setting unit and a communication detection unit; through the cooperative work and dynamic optimization of the dual-mode communication module, the accuracy, real-time performance and reliability of data transmission are significantly improved, and effective monitoring and remote control of the intelligent measurement switch state are ensured.

[0041] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other manners. The described device embodiments are merely illustrative. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling, or direct coupling or communication connection between the components can be indirect coupling or communication connection through some interfaces, devices, or units, and can be electrical, mechanical, or in other forms.

[0042] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units; they can be located in one place, or distributed on multiple network units; and some or all of the units can be selected as needed to achieve the purposes of the embodiments.

[0043] In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; and the integrated unit can be implemented in the form of hardware or hardware plus software functional units.

[0044] Those of ordinary skill in the art can understand that all or part of the steps of the above-described method embodiments can be completed by a program instructing related hardware, and the foregoing program can be stored in a computer readable storage medium, and when the program is executed, the steps of the method embodiments are executed; and the foregoing storage medium includes mobile storage devices, read-only memories (ROMs), random access memories (RAMs), magnetic disks or optical disks, and various media that can store program codes.

[0045] Alternatively, the integrated units of the present application, if implemented in the form of software functional modules and sold or used as independent products, can also be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present application. The foregoing storage medium includes mobile storage devices, ROMs, RAMs, magnetic disks or optical disks, and various media that can store program codes.

Claims

1. An intelligent measurement system based on HPLC and HRF dual mode communication, characterized in that, Including: At least one intelligent measurement switch terminal, at least one data concentrator, and a master station system; Both the intelligent measurement switch terminal and the data concentrator are equipped with a dual-mode communication module, and the dual-mode communication module includes an HPLC communication unit, an HRF communication unit, a parameter setting unit, and a communication detection unit; The intelligent measurement switch terminal is used to monitor the electrical parameters of the power distribution and utilization line and perform line protection actions, and perform data interaction with the data concentrator through the dual-mode communication module; The data concentrator is used to collect data of multiple intelligent measurement switch terminals and perform remote communication with the master station system; The master station system is used for data storage, analysis, and remote control; The communication detection unit at least includes: an HPLC communication detection unit and an HRF communication detection unit; The HPLC communication detection unit includes power spectral density detection and cold wire communication test; The HRF communication detection unit includes power spectral density detection, maximum transmit power detection, and receive sensitivity detection; The steps of the power spectral density detection specifically include: Obtain the current frequency band and the test items in the current power spectral density detection; According to the sub-test items in the current power spectral density detection, determine the theoretical value range of the corresponding test item; extract the test data of the corresponding test item in the current frequency band; If the test data of the test item in the current frequency band is within the theoretical value range of the corresponding test data, the current frequency band is normal; Traverse all frequency bands in the current power spectral density detection process to obtain the accuracy rate of the corresponding test item; If the accuracy rate of the corresponding test item is greater than the preset first accuracy rate threshold, the current test item is qualified; If all test items in the current power spectral density detection are qualified, the corresponding power spectral density detection is qualified. 2.The intelligent measurement system based on HPLC and HRF dual-mode communication of claim 1, wherein, The intelligent measurement switch terminal includes: a measurement unit, a protection unit, and a control unit; The measurement unit is used to collect the power data of the line; The protection unit is used to drive the switch to trip when an overcurrent or short-circuit fault is detected; The control unit is connected to the measurement unit, the protection unit, and the dual-mode communication module, and is used to process data and control communication behavior. 3.The intelligent measurement system based on HPLC and HRF dual-mode communication of claim 1, wherein, After the power spectral density detection is qualified, it further includes: Obtain the noise intensity value at the current position; Multiply the noise intensity value at the current position by a preset attenuation coefficient to obtain the current power spectral density revised value; Subtract the power spectral density revised value from the preset power spectral density to obtain the revised power spectral density.

4. The intelligent measurement system based on HPLC and HRF dual-mode communication according to claim 1, wherein, The steps of the cold wire communication test specifically include: Obtain the transmit power spectral density and the test items in the current cold wire communication test; According to the test items in the current cold wire communication test, determine the theoretical value range of the corresponding test item; extract the attenuation value during the corresponding test item; If the attenuation value during the test item is within the theoretical value range of the corresponding test item, record the number of qualified tests once; after traversing all test times, extract the total number of qualified tests and calculate the success rate of the corresponding test item; if the success rate is higher than the corresponding success rate threshold, the test item in the corresponding cold wire communication test is qualified; When all test items in the cold-line communication test are qualified, the corresponding cold-line communication test is qualified.

5. The intelligent measurement system based on HPLC and HRF dual-mode communication according to claim 1, wherein, The step of detecting the maximum transmission power specifically comprises: acquiring a test mode of current maximum transmission power detection; determining current wireless parameters according to the test mode of current maximum transmission power detection; acquiring current transmission power detection data based on the test mode and the wireless parameters of current maximum transmission power detection; if the current transmission power detection data is less than or equal to a preset power threshold, the corresponding maximum transmission power detection is qualified.

6. The intelligent measurement system based on HPLC and HRF dual-mode communication according to claim 5, wherein, After the maximum transmission power detection is qualified, the method further comprises: acquiring a distance value between the smart metering switch terminal and the data concentrator; calculating a current theoretical transmission power according to the distance value between the smart metering switch terminal and the data concentrator; comparing and analyzing the current theoretical transmission power and the preset power threshold, and taking the minimum value as the transmission power of current communication.

7. The intelligent measurement system based on HPLC and HRF dual-mode communication according to claim 1, wherein, The dual-mode communication module is further configured to: acquire communication quality parameters of the HPLC communication link and the HRF communication link in real time; calculate a comprehensive quality score value of each communication link based on the communication quality parameters; extract a communication link with the highest comprehensive score value as a communication path for current data transmission. 8.The intelligent measurement system based on HPLC and HRF dual-mode communication of claim 7, wherein, When an emergency event occurs, the HPLC communication link and the HRF communication link simultaneously perform data transmission on data in the emergency event. The emergency event includes at least one of a short-circuit tripping event, an overload alarm event, and a switch state displacement event.

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